[1]孙 峰,郑 亮,傅宗甫,等.超大直径越江隧道河段极端洪潮冲刷深度预测[J].长安大学学报(自然科学版),2025,45(4):95-106.[doi:10.19721/j.cnki.1671-8879.2025.04.008]
　SUN Feng,ZHENG Liang,FU Zong-fu,et al.Prediction of extreme flood scouring depth of river-crossing section of very large diameter crossing tunnel[J].Journal of Chang’an University (Natural Science Edition),2025,45(4):95-106.[doi:10.19721/j.cnki.1671-8879.2025.04.008]
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超大直径越江隧道河段极端洪潮冲刷深度预测()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第45卷
期数:
2025年4期
页码:
95-106
栏目:
桥梁与隧道工程
出版日期:
2025-07-30

文章信息/Info

Title:
Prediction of extreme flood scouring depth of river-crossing section of very large diameter crossing tunnel
文章编号:
1671-8879(2025)04-0095-12
作者:
孙 峰1; 郑 亮2; 傅宗甫2; 徐鼎平3
(1. 中铁第四勘察设计院集团有限公司,湖北 武汉 430063; 2. 河海大学 水利水电学院,江苏 南京 210098; 3. 中国科学院武汉岩土力学研究所,湖北 武汉 430071)
Author(s):
SUN Feng1;  ZHENG Liang2;  FU Zong-fu2;  XU Ding-ping3
(1. China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430063, Hubei, China; 2. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, Jiangsu, China; 3. Institute of Rock and Soil Mechanics, Chinese Academy of sciences, Wuhan 430071, Hubei, China)
关键词:
隧道工程;  极端洪水冲刷深度;  模型试验;  隧道埋深
Keywords:
tunnel engineering;  extreme flood scour depth;  model test;  tunnel burial depth
分类号:
U452.2
DOI:
10.19721/j.cnki.1671-8879.2025.04.008
文献标志码:
A
摘要:
为确定富春江秦望通道工程过江段的合理埋深取值范围,通过数学模型模拟计算河段平面水位及流场情况,在此基础上结合物理模型试验研究上边界100年一遇洪水流量+下边界100年一遇洪水位、上边界100年一遇洪水流量+下边界最低潮水位、上边界300年一遇洪水流量+下边界100年一遇洪水位、上边界300年一遇洪水流量+下边界最低潮水位(工况1～4)4种洪潮组合工况下隧址处河床最大冲刷深度,并与数学模型计算结果进行相互验证。研究结果表明:在相同洪水流量下,下游低潮位时河道水流量大,水位低,上下游水位差较大,因此,流速相对较大,更容易在河槽产生冲刷; 在工况2和4下,数学模型极限冲刷深度计算结果分别为4.50与6.45 m; 在4种工况,动床冲刷模型极限冲刷深度分别为1.50 、1.95、2.40、4.50 m; 动床冲刷试验反映洪水相应历时(原型70 h)及极限水文条件下的河床冲刷情况,冲刷深度比较符合实际情况,可为盾构穿越江河工程安全控制提供参考。
Abstract:
To determine the reasonable burial depth range for the Qinwang Crossing Project's river-crossing section in the Fuchun River, a mathematical model was first employed to simulate the planar water level distribution and flow field condition of the river segment. Based on these simulations, physical model tests were conducted to study the maximum scour depth at the tunnel site under four combined flood-tide scenarios(Scenarios 1-4): upstream boundary with 100-year flood discharge + downstream boundary with 100-year flood water level, upstream boundary with 100-year flood discharge + downstream boundary with lowest tidal water level, upstream boundary with 300-year flood discharge + downstream boundary with 100-year flood water level, and upstream boundary with 300-year flood discharge + downstream boundary with lowest tidal water level, results were cross-validated with mathematical model calculations for accuracy. The research results indicate that under the same flood discharge, when the downstream tide is low, the river flow is greater, the water level is lower, and there is a significant difference in water levels between upstream and downstream. Consequently, the flow velocity is relatively high, making erosion more likely in the river channel. For Scenarios 2 and 4, by calculated the mathematical model the maximum scour depths of 4.50 and 6.45 m, respectively, by yielded while the live-bed scour model the maximum scour depths of 1.50,1.95, 2.40, and 4.50 m under the four scenarios respectively. The live-bed scour tests reflect the riverbed scour conditions during the corresponding flood duration(70 hours in prototype)and under the extreme hydrological conditions, with scour depths aligning well with actual conditions, providing valuable references for safety control in shield tunneling river-crossing projects.8 tabs, 9 figs, 25 refs.

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备注/Memo

备注/Memo:
收稿日期:2024-12-17
基金项目:国家重点研发计划项目(2023YFB2603600); 国家自然科学基金项目(52279117)
作者简介:孙 峰(1985-),男,山东东阿人,高级工程师,E-mail:1040385071@qq.com。
更新日期/Last Update: 2025-07-25